As well as bringing nitrogen into agroecosystems through biological nitrogen fixation, types of cover crops known as " catch crops " are used to retain and recycle soil nitrogen already present.
12.
The catch crops take up surplus nitrogen remaining from fertilization of the previous crop, preventing it from being lost through leaching ( Morgan " et al . " 1942 ), or gaseous denitrification or volatilization ( Thorup-Kristensen " et al . " 2003 ).
13.
Furthermore, the town is the namesake of the well known in Germany " Landsberger Gemenge " ( roughly " Landsberg Batch " ), a winter catch crop made out of crimson clover, Italian ryegrass and fodder vetch, which is used as livestock fodder or silage.
